25256e23dd486d0effda88377901701cf52db6a9
[libav.git] / libavcodec / rv34data.h
1 /*
2 * RealVideo 4 decoder
3 * copyright (c) 2007 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file rv34data.h
24 * miscellaneous RV30/40 tables
25 */
26
27 #ifndef FFMPEG_RV34DATA_H
28 #define FFMPEG_RV34DATA_H
29
30 #include <stdint.h>
31
32 /**
33 * number of ones in nibble minus one
34 */
35 static const uint8_t rv34_count_ones[16] = {
36 0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 1, 2, 2, 3
37 };
38
39 /**
40 * values used to reconstruct coded block pattern
41 */
42 static const uint8_t rv34_cbp_code[16] = {
43 0x00, 0x20, 0x10, 0x30, 0x02, 0x22, 0x12, 0x32,
44 0x01, 0x21, 0x11, 0x31, 0x03, 0x23, 0x13, 0x33
45 };
46
47 /**
48 * precalculated results of division by three and modulo three for values 0-107
49 *
50 * A lot of four-tuples in RV40 are represented as c0*27+c1*9+c2*3+c3.
51 * This table allows conversion from a value back to a vector.
52 */
53 static const uint8_t modulo_three_table[108][4] = {
54 { 0, 0, 0, 0 }, { 0, 0, 0, 1 }, { 0, 0, 0, 2 }, { 0, 0, 1, 0 },
55 { 0, 0, 1, 1 }, { 0, 0, 1, 2 }, { 0, 0, 2, 0 }, { 0, 0, 2, 1 },
56 { 0, 0, 2, 2 }, { 0, 1, 0, 0 }, { 0, 1, 0, 1 }, { 0, 1, 0, 2 },
57 { 0, 1, 1, 0 }, { 0, 1, 1, 1 }, { 0, 1, 1, 2 }, { 0, 1, 2, 0 },
58 { 0, 1, 2, 1 }, { 0, 1, 2, 2 }, { 0, 2, 0, 0 }, { 0, 2, 0, 1 },
59 { 0, 2, 0, 2 }, { 0, 2, 1, 0 }, { 0, 2, 1, 1 }, { 0, 2, 1, 2 },
60 { 0, 2, 2, 0 }, { 0, 2, 2, 1 }, { 0, 2, 2, 2 }, { 1, 0, 0, 0 },
61 { 1, 0, 0, 1 }, { 1, 0, 0, 2 }, { 1, 0, 1, 0 }, { 1, 0, 1, 1 },
62 { 1, 0, 1, 2 }, { 1, 0, 2, 0 }, { 1, 0, 2, 1 }, { 1, 0, 2, 2 },
63 { 1, 1, 0, 0 }, { 1, 1, 0, 1 }, { 1, 1, 0, 2 }, { 1, 1, 1, 0 },
64 { 1, 1, 1, 1 }, { 1, 1, 1, 2 }, { 1, 1, 2, 0 }, { 1, 1, 2, 1 },
65 { 1, 1, 2, 2 }, { 1, 2, 0, 0 }, { 1, 2, 0, 1 }, { 1, 2, 0, 2 },
66 { 1, 2, 1, 0 }, { 1, 2, 1, 1 }, { 1, 2, 1, 2 }, { 1, 2, 2, 0 },
67 { 1, 2, 2, 1 }, { 1, 2, 2, 2 }, { 2, 0, 0, 0 }, { 2, 0, 0, 1 },
68 { 2, 0, 0, 2 }, { 2, 0, 1, 0 }, { 2, 0, 1, 1 }, { 2, 0, 1, 2 },
69 { 2, 0, 2, 0 }, { 2, 0, 2, 1 }, { 2, 0, 2, 2 }, { 2, 1, 0, 0 },
70 { 2, 1, 0, 1 }, { 2, 1, 0, 2 }, { 2, 1, 1, 0 }, { 2, 1, 1, 1 },
71 { 2, 1, 1, 2 }, { 2, 1, 2, 0 }, { 2, 1, 2, 1 }, { 2, 1, 2, 2 },
72 { 2, 2, 0, 0 }, { 2, 2, 0, 1 }, { 2, 2, 0, 2 }, { 2, 2, 1, 0 },
73 { 2, 2, 1, 1 }, { 2, 2, 1, 2 }, { 2, 2, 2, 0 }, { 2, 2, 2, 1 },
74 { 2, 2, 2, 2 }, { 3, 0, 0, 0 }, { 3, 0, 0, 1 }, { 3, 0, 0, 2 },
75 { 3, 0, 1, 0 }, { 3, 0, 1, 1 }, { 3, 0, 1, 2 }, { 3, 0, 2, 0 },
76 { 3, 0, 2, 1 }, { 3, 0, 2, 2 }, { 3, 1, 0, 0 }, { 3, 1, 0, 1 },
77 { 3, 1, 0, 2 }, { 3, 1, 1, 0 }, { 3, 1, 1, 1 }, { 3, 1, 1, 2 },
78 { 3, 1, 2, 0 }, { 3, 1, 2, 1 }, { 3, 1, 2, 2 }, { 3, 2, 0, 0 },
79 { 3, 2, 0, 1 }, { 3, 2, 0, 2 }, { 3, 2, 1, 0 }, { 3, 2, 1, 1 },
80 { 3, 2, 1, 2 }, { 3, 2, 2, 0 }, { 3, 2, 2, 1 }, { 3, 2, 2, 2 },
81 };
82
83 /**
84 * quantizer values used for AC and DC coefficients in chroma blocks
85 */
86 static const uint8_t rv34_chroma_quant[2][32] = {
87 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
88 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 25 },
89 { 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
90 14, 15, 15, 16, 17, 18, 18, 19, 20, 20, 21, 21, 22, 22, 23, 23 }
91 };
92
93 /**
94 * This table is used for dequantizing.
95 */
96 static const uint16_t rv34_qscale_tab[32] = {
97 60, 67, 76, 85, 96, 108, 121, 136,
98 152, 171, 192, 216, 242, 272, 305, 341,
99 383, 432, 481, 544, 606, 683, 767, 854,
100 963, 1074, 1212, 1392, 1566, 1708, 1978, 2211
101 };
102
103 /**
104 * 4x4 dezigzag pattern
105 */
106 static const uint8_t rv34_dezigzag[16] = {
107 0, 1, 8, 16,
108 9, 2, 3, 10,
109 17, 24, 25, 18,
110 11, 19, 26, 27
111 };
112
113 /**
114 * tables used to translate a quantizer value into a VLC set for decoding
115 * The first table is used for intraframes.
116 */
117 static const uint8_t rv34_quant_to_vlc_set[2][31] = {
118 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1,
119 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0 },
120 { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3,
121 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6 },
122 };
123
124 /**
125 * table for obtaining the quantizer difference
126 * @todo Use with modified_quant_tab from h263data.h.
127 */
128 static const uint8_t rv34_dquant_tab[2][32]={
129 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
130 {
131 0, 3, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9,10,11,12,13,14,15,16,17,18,18,19,20,21,22,23,24,25,26,27,28
132 },{
133 0, 2, 3, 4, 5, 6, 7, 8, 9,10,11,13,14,15,16,17,18,19,20,21,22,24,25,26,27,28,29,30,31,31,31,26
134 }
135 };
136
137 /**
138 * maximum number of macroblocks for each of the possible slice offset sizes
139 * @todo This is the same as ff_mba_max, maybe use it instead.
140 */
141 static const uint16_t rv34_mb_max_sizes[6] = { 0x2F, 0x68, 0x18B, 0x62F, 0x18BF, 0x23FF };
142 /**
143 * bits needed to code the slice offset for the given size
144 * @todo This is the same as ff_mba_length, maybe use it instead.
145 */
146 static const uint8_t rv34_mb_bits_sizes[6] = { 6, 7, 9, 11, 13, 14 };
147
148 #endif /* FFMPEG_RV34DATA_H */